MEASUREMENT AND INTERPRETATION OF MOTIONAL ELECTRIC FIELDS IN THE SEA.
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF GEOLOGY AND GEOPHYSICS
Pagination or Media Count:
The total motional electric current distribution is investigated for a quasi-steady, 3-dimensional ocean current. In order that electric currents associated with time variations in the induced magnetic field be negligible, a restriction is placed on the temporal and spacial variations of the flow. The quasi-static electric potential is calculated for a general flow and for a model of the Gulf Stream. The 3-dimensional solution for the electric potential is particularized for a 2-dimensional current which is broad compared with the oceans depth. It is shown that for such a broad flow the electric current stream function is proportional to a transport function. The surface expression and total structure of the electric current are calculated for several simple flows and for a cross section of the Gulf Stream. A detailed comparison of several GEK traverses across the Gulf Stream taken in conjunction with hydrographic sections reveals the presence of inertial period oscillations in the surface layers.
- Physical and Dynamic Oceanography